injection pump短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 喷射泵,压注泵 This paper focuses on: effects of different hobbing cutter's pressure angles and pressure angle values on gear machining when hobbing cutter to cut injection pump gear is designed. 前言：本文着重论述了在设计与加工油泵齿轮滚刀时，其滚刀压力角的选择以及压力角的大小，对加工齿轮时所产生的各种影响。 chemyq